Bearing detection bench dynamic load testing device for vehicle production

Abstract

The invention belongs to the technical field of bearing detection, and provides a bearing detection table dynamic load test device for vehicle production, which comprises a detection table, the detection table is fixedly connected with a support frame, the upper end surface of the support frame is fixedly connected with a motor, and an elastic assembly for damping the motor is arranged between the motor and the support frame. An output shaft of the motor is fixedly connected with an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with a sleeve, and a limiting mechanism used for positioning the electric telescopic rod is arranged outside the electric telescopic rod. According to the invention, the regulation and control system can position and adjust the motor by controlling the elastic assembly, the limiting mechanism, the positioning assembly, the suction assembly and the water circulation system, and meanwhile, the regulation and control system adjusts the connection stability between the electric telescopic rod and the thin-wall bearing.

Description

Technical Field

[0001] This invention belongs to the field of bearing testing technology, and in particular relates to a dynamic load testing device for a bearing testing bench used in vehicle production. Background Technology

[0002] Dynamic load testing of bearings refers to testing the performance of bearings under dynamic load conditions to evaluate their operating status and lifespan under actual working conditions. Dynamic load testing primarily assesses the performance of bearings under dynamic load conditions. Dynamic loads include centrifugal force, inertial force, and frictional force generated during rotation. Through dynamic load testing, the stress conditions, wear conditions, fatigue life, and wear resistance of the bearing during operation can be understood, thereby ensuring the reliability and durability of the bearing during vehicle operation.

[0003] With the rapid development of new energy vehicles, especially electric vehicles, the performance requirements for vehicle components are increasing. Due to the unique characteristics of their power systems, such as high torque output, frequent start-stop cycles, and high-speed operation, electric vehicles place higher demands on bearings in terms of load-bearing capacity, wear resistance, heat dissipation, and vibration suppression. At the same time, the trend towards lightweighting in electric vehicles is also driving the development of bearings towards thinner walls and higher precision, which poses greater challenges to traditional bearing testing equipment in simulating actual working conditions and maintaining test stability.

[0004] Existing dynamic load testing equipment for bearing testing benches used in vehicle production typically uses a motor to drive the bearing through a transmission device when testing thin-walled bearings. Long-term rotation tests are conducted to understand the bearing's wear and fatigue life during extended operation. However, the motor and transmission device themselves will generate vibrations and misalignments during long-term operation. These vibrations and misalignments affect the stability of the bearing rotation and accelerate bearing wear. Simultaneously, when the transmission device is connected to the bearing, slippage can easily occur between the transmission device and the bearing's inner wall under long-term rotation conditions. This causes relative movement between the transmission device and the bearing's inner wall, not only leading to bearing wear but also, over time, causing the transmission device to detach from the bearing's inner wall, resulting in experimental interruption.

[0005] Summary of the Invention

[0006] The purpose of this invention is to provide a dynamic load testing device for bearing testing benches used in vehicle production, which aims to solve the technical problem that vibration and misalignment of motors and transmission devices can affect the stability of bearing rotation in the prior art.

[0007] The present invention is implemented as follows: a dynamic load testing device for a bearing testing bench for vehicle production includes a testing bench, a support frame fixedly connected to the testing bench, an electric motor fixedly connected to the upper end face of the support frame, an elastic component for damping the electric motor between the electric motor and the support frame, an electric telescopic rod fixedly connected to the output shaft of the electric motor, a sleeve fixedly connected to the telescopic end of the electric telescopic rod, and a limiting mechanism for positioning the electric telescopic rod on the outside of the electric telescopic rod.

[0008] The sleeve is fixedly connected with multiple retractable electric telescopic sleeves. Each telescopic end of the electric telescopic sleeve is equipped with a suction component. The suction component can be attracted and fixed to the inner ring of the thin-walled bearing. Each suction component is fixedly connected with a positioning component. All positioning components can abut and limit the inner ring of the thin-walled bearing, and the positioning components can seal the suction components. All positioning components are connected to a water circulation system, which can dissipate heat from the positioning components and the inner ring of the thin-walled bearing.

[0009] The testing platform is equipped with a pressurizing mechanism for applying external load to the outer ring of the thin-walled bearing. A limiting seat is provided in the middle of the pressurizing mechanism, and the limiting seat is fixedly connected to the upper end face of the testing platform.

[0010] The control system can adjust the position of the motor by controlling the elastic component, limit mechanism, positioning component, suction component and water circulation system. At the same time, the control system adjusts the stability of the connection between the electric telescopic rod and the thin-walled bearing.

[0011] Further technical solution: The elastic component includes a rubber pad and a No. 1 air pump. The No. 1 air pump is provided between the motor and the upper end face of the support frame. The bottom surface of the support frame is provided with a rubber pad. The rubber pad and the No. 1 air pump are connected by a conduit, and the conduit is provided with a unidirectional air guide valve for the No. 1 air pump.

[0012] Further technical solution: The limiting mechanism includes an electric telescopic frame, gears, a gear sleeve, and a fixed frame;

[0013] The fixed frame is fixedly connected to the end face of the testing table. Multiple electric telescopic frames are fixedly distributed on the inner wall of the fixed frame. The telescopic ends of the electric telescopic frames are rotatably equipped with gears. The electric telescopic rod is fixedly connected to the outside of the gear sleeve. The gear sleeve can mesh with all the gears. The meshing teeth on the gears and the gear sleeve are made of rubber. The gear is provided with a fan blade in the middle.

[0014] Further technical solution: The suction component includes an elastic telescopic sleeve, a suction cup, and a second air pump;

[0015] The elastic telescopic sleeve is fixedly connected to the telescopic end of the electric telescopic sleeve, and a suction cup is fixedly connected to the telescopic end of the elastic telescopic sleeve. A second air pump is installed in the sleeve, and the second air pump is connected to all suction cups through each electric telescopic sleeve.

[0016] A further technical solution: the positioning component includes a positioning seat and rubber teeth;

[0017] The fixing part of the elastic telescopic sleeve is fixedly connected to the positioning seat. The end face of the positioning seat near the suction cup is arc-shaped, and multiple rubber teeth are fixedly connected to the arc-shaped surface of the positioning seat. The rubber teeth are inclined in the same direction of rotation.

[0018] Further technical solution: The water circulation system includes a water tank, water pipes, a one-way solenoid valve, and rubber hoses;

[0019] The electric telescopic rod is externally fixedly connected to a water tank. Each of the rubber teeth is provided with a rubber tube that communicates with the positioning seat. The rubber teeth are provided with an opening groove for placing the rubber tube. Two water pipes are provided between the positioning seat and the water tank. One-way solenoid valves with opposite directions of conduction are provided on the two water pipes. A water pump that can drive water flow between the positioning seat and the water tank is provided in the water tank.

[0020] Further technical solution: The pressurizing mechanism includes a fixed base, an electric telescopic base, and a clamp;

[0021] Both sides of the limiting seat are fixedly connected to fixed seats, and the end face of the fixed seat opposite the limiting seat is fixedly connected to an electric telescopic seat. The telescopic end of the electric telescopic seat is fixedly connected to a clamp.

[0022] Further technical solution: The control system includes:

[0023] The monitoring module includes a pressure sensor and a vibration sensor. Each positioning seat is equipped with a pressure sensor, which is located on the end face of a rubber tooth facing the inner wall of the thin-walled bearing. The electric telescopic rod is equipped with a vibration sensor on the side wall near the thin-walled bearing.

[0024] The storage module is used to store the pressure values ​​of all pressure sensors and the vibration frequency values ​​of vibration sensors at the same time.

[0025] The processing module is used to compare the pressure values ​​of all pressure sensors and the vibration frequency values ​​of vibration sensors at the same time with the pressure threshold and vibration frequency threshold in the corresponding processing module, and form judgment information respectively.

[0026] The control module is used to control the elastic components, limit mechanisms, positioning components, suction components, and water circulation system.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1. The control system can adjust the position of the motor by controlling the elastic component, limit mechanism, positioning component, suction component and water circulation system. At the same time, the control system adjusts the stability of the connection between the electric telescopic rod and the thin-walled bearing.

[0029] 2. When the vibration frequency value of the vibration sensor reaches the preset threshold in the processing module, the control module activates the elastic component and the limiting mechanism. The rubber pad increases the air pressure in the No. 1 air pump, thereby increasing the stability of the motor and preventing errors in the thin-walled bearing test results caused by motor vibration. At the same time, all electric telescopic frames extend and simultaneously drive the connected gears to mesh with the gear sleeves on the electric telescopic rod. Under the limiting action of all gears, the electric telescopic rod remains positioned at the center of the thin-walled bearing. The inclined surfaces of the gears and the gear sleeves on the electric telescopic rod contact each other, increasing the contact area between the gears and the gear sleeves, thereby increasing the positioning effect of each gear on the gear sleeves. Through the cooperation of the elastic component and the limiting mechanism, the stability of the motor and the electric telescopic rod during operation is ensured.

[0030] 3. Furthermore, the control module controls the rated conduction pressure of the two water pipes to increase, thereby increasing the water pressure in the positioning seat. This allows each rubber tube to elastically squeeze the rubber teeth under the action of water pressure, thereby increasing the vibration reduction effect on the end of the electric telescopic rod and preventing the electric telescopic rod from colliding with the inner ring of the thin-walled bearing when it vibrates.

[0031] 4. When the pressure value of a pressure sensor is less than the preset threshold in the processing module, the control module activates the limiting mechanism, suction component, and electric telescopic sleeve. The limiting mechanism ensures that the end face of the electric telescopic rod is in the center position of the thin-walled bearing, preventing the electric telescopic rod from shifting and causing unstable connection between the electric telescopic rod and the inner ring of the thin-walled bearing. At the same time, each electric telescopic sleeve extends to increase the contact force between the rubber teeth and the inner ring of the thin-walled bearing. The second air pump starts and further reduces the air pressure in the elastic telescopic sleeve, thereby increasing the tightness of the connection between the suction cup and the inner ring of the thin-walled bearing.

[0032] 5. The rubber teeth are inclined in the same direction of rotation. When the electric telescopic rod rotates clockwise, the squeezing force between each rubber tooth can increase the connection stability between the positioning seat and the inner ring of the thin-walled bearing. At the same time, all the rubber teeth can seal the periphery of the suction cup, increasing the sealing stability between the suction cup and the inner ring of the thin-walled bearing. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0034] Figure 2This is a schematic diagram showing the connection between the electric telescopic rod, the limiting mechanism, and the positioning component in this invention.

[0035] Figure 3 This is a schematic diagram of the structure of the elastic component in this invention.

[0036] Figure 4 This is a schematic diagram of the limiting mechanism in this invention.

[0037] Figure 5 This is a schematic diagram of the positioning component in this invention.

[0038] Figure 6 This is a schematic diagram of the suction component in this invention.

[0039] Figure 7 This is a schematic diagram of the water circulation system in this invention.

[0040] Figure 8 This is a schematic diagram of the control system in this invention.

[0041] In the attached diagram: 1. Testing table; 2. Support frame; 3. Limiting seat; 4. Pressurizing mechanism; 41. Fixed seat; 42. Electric telescopic seat; 43. Clamp; 5. Elastic component; 51. Rubber pad; 52. No. 1 air pump; 6. Limiting mechanism; 61. Electric telescopic frame; 62. Gear; 63. Gear sleeve; 64. Fixed frame; 7. Positioning component; 71. Positioning seat; 72. Rubber tooth; 8. Suction component; 81. Elastic telescopic sleeve; 82. Suction cup; 83. No. 2 air pump; 9. Water circulation system; 91. Water tank; 92. Water pipe; 93. One-way solenoid valve; 94. Rubber hose; 10. Electric motor; 11. Electric telescopic rod; 12. Sleeve; 13. Electric telescopic sleeve. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0043] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0044] like Figures 1-8As shown, this invention provides a dynamic load testing device for a bearing testing bench in vehicle production, comprising a testing bench 1, a support frame 2 fixedly connected to the testing bench 1, a motor 10 fixedly connected to the upper end face of the support frame 2, an elastic component 5 for damping the motor 10 between the motor 10 and the support frame 2, an electric telescopic rod 11 fixedly connected to the output shaft of the motor 10, a sleeve 12 fixedly connected to the telescopic end of the electric telescopic rod 11, and a limiting mechanism 6 for positioning the electric telescopic rod 11 on the outside of the electric telescopic rod 11.

[0045] The sleeve 12 is fixedly connected to a plurality of retractable electric telescopic sleeves 13. Each telescopic end of the electric telescopic sleeve 13 is provided with a suction component 8. The suction component 8 can be attracted and fixed to the inner ring of the thin-walled bearing. Each suction component 8 is fixedly connected to a positioning component 7. All positioning components 7 can abut and limit the inner ring of the thin-walled bearing, and the positioning components 7 can seal the periphery of the suction component 8. All positioning components 7 are connected to a water circulation system 9. The water circulation system 9 can dissipate heat from the positioning components 7 and the inner ring of the thin-walled bearing.

[0046] The testing platform 1 is equipped with a pressurizing mechanism 4 for applying external load to the outer ring of the thin-walled bearing. A limiting seat 3 is provided in the middle of the pressurizing mechanism 4, and the limiting seat 3 is fixedly connected to the upper end face of the testing platform 1.

[0047] The control system can adjust the positioning of the motor 10 by controlling the elastic component 5, the limiting mechanism 6, the positioning component 7, the suction component 8, and the water circulation system 9. At the same time, the control system adjusts the stability of the connection between the electric telescopic rod 11 and the thin-walled bearing.

[0048] In this embodiment, the thin-walled bearing is positioned on the limiting seat 3, and then the pressurizing mechanism 4 is activated to clamp and fix the thin-walled bearing, and to apply an external load to the outer ring of the thin-walled bearing.

[0049] When the electric telescopic rod 11 is activated, it extends, causing the positioning component 7 and the suction component 8 to extend into the inner side of the thin-walled bearing. When all the electric telescopic sleeves 13 are activated, they extend simultaneously, causing the suction component 8 connected to them to adhere to the inner ring of the thin-walled bearing. Then, all the positioning components 7 can abut and limit the inner ring of the thin-walled bearing, and the positioning components 7 can seal the periphery of the suction component 8, thereby increasing the connection stability between the suction component 8 and the inner ring of the thin-walled bearing. The water circulation system 9 can cooperate with the positioning components 7 to limit the thin-walled bearing.

[0050] When the motor 10 is started to rotate, the motor 10 drives the electric telescopic rod 11 to rotate. With the cooperation of the positioning component 7, the suction component 8 and the water circulation system 9, the electric telescopic rod 11 drives the inner ring of the thin-walled bearing to rotate synchronously. At this time, the limiting mechanism 6 positions the electric telescopic rod 11 to prevent the center line of the electric telescopic rod 11 from deviating from the rotation axis of the thin-walled bearing, thereby causing the connection between the electric telescopic rod 11 and the inner ring of the thin-walled bearing to be unstable and causing the electric telescopic rod 11 to spin freely.

[0051] When the thin-walled bearing is driven by the motor 10 for dynamic load testing, after long-term operation, the thin-walled bearing will wear and heat up. At this time, the electric telescopic rod 11 connected to the inner ring of the thin-walled bearing is prone to unstable connection between the electric telescopic rod 11 and the inner ring of the thin-walled bearing due to the vibration of the thin-walled bearing. On the other hand, the motor 10 itself vibrates during long-term operation, which ultimately affects the accuracy of the test results of the thin-walled bearing.

[0052] In this invention, the control system can adjust the positioning of the motor 10 by controlling the elastic component 5, the limiting mechanism 6, the positioning component 7, the suction component 8, and the water circulation system 9. At the same time, the control system adjusts the connection stability between the electric telescopic rod 11 and the inner ring of the thin-walled bearing.

[0053] like Figure 3 As shown, this invention provides a dynamic load testing device for a bearing testing bench in vehicle production. The elastic component 5 includes a rubber pad 51 and a first air pump 52. The first air pump 52 is disposed between the motor 10 and the upper end face of the support frame 2. The bottom surface of the support frame 2 is provided with a rubber pad 51. The rubber pad 51 and the first air pump 52 are connected by a conduit, and the conduit is provided with a unidirectional air valve that leads to the first air pump 52.

[0054] In this embodiment, the No. 1 air pump 52 is set at the bottom of the motor 10 to dampen the motor 10, so as to avoid the motor 10 from loosening due to long-term vibration of the test platform 1. The rubber pad 51 is activated, which can increase the air pressure in the No. 1 air pump 52, thereby increasing the stability of the motor 10 and avoiding the error in the test results of the thin-walled bearing caused by the vibration of the motor 10.

[0055] like Figure 4 As shown, this invention provides a dynamic load testing device for a bearing testing bench in vehicle production. The limiting mechanism 6 includes an electric telescopic frame 61, a gear 62, a gear sleeve 63, and a fixed frame 64.

[0056] The fixed frame 64 is fixedly connected to the end face of the testing table 1. Multiple electric telescopic frames 61 are fixedly distributed on the inner wall of the fixed frame 64. The telescopic ends of the electric telescopic frames 61 are rotatably equipped with gears 62. The electric telescopic rod 11 is fixedly connected to the outside with a toothed sleeve 63. The toothed sleeve 63 can mesh with all the gears 62. The meshing teeth on the gears 62 and the toothed sleeve 63 are made of rubber. The middle of the gear 62 is provided with an exhaust fan blade.

[0057] In this embodiment, all electric telescopic frames 61 are extended simultaneously, and all electric telescopic frames 61 simultaneously drive the gears 62 connected to them to mesh with the gear sleeves 63 on the electric telescopic rod 11. Under the limiting action of all gears 62, the electric telescopic rod 11 is always positioned at the center of the thin-walled bearing.

[0058] When the electric telescopic rod 11 rotates, under the meshing action of gear 62 and gear sleeve 63, all gears 62 rotate, and all gears 62 drive the fan blades connected to them to draw air to the thin-walled bearing, so as to avoid the thin-walled bearing from being too hot during continuous rotation test and causing high-temperature deformation, which would affect the fatigue test results of the thin-walled bearing.

[0059] Figure 6 As shown, this invention provides a dynamic load testing device for a bearing testing bench used in vehicle production. The suction component 8 includes an elastic telescopic sleeve 81, a suction cup 82, and a second air pump 83.

[0060] The elastic telescopic sleeve 81 is fixedly connected to the telescopic end of the electric telescopic sleeve 13. The telescopic end of the elastic telescopic sleeve 81 is fixedly connected to a suction cup 82. A second air pump 83 is provided in the sleeve 12. The second air pump 83 is connected to all suction cups 82 through each electric telescopic sleeve 13.

[0061] In this embodiment, when the electric telescopic sleeve 13 extends, the elastic telescopic sleeve 81 drives the suction cup 82 to elastically abut against the inner ring sidewall of the thin-walled bearing. Then, the second air pump 83 is started, which creates a negative pressure environment in all the suction cups 82, thereby making the elastic telescopic sleeve 81 stably connected to the inner ring of the thin-walled bearing.

[0062] like Figure 5 As shown, this invention provides a dynamic load testing device for a bearing testing bench used in vehicle production. The positioning component 7 includes a positioning seat 71 and rubber teeth 72.

[0063] The fixing part of the elastic telescopic sleeve 81 is fixedly connected to the positioning seat 71. The end face of the positioning seat 71 near the suction cup 82 is arc-shaped, and multiple rubber teeth 72 are fixedly connected to the arc-shaped surface of the positioning seat 71. The rubber teeth 72 are inclined in the same direction of rotation.

[0064] In this embodiment, the electric telescopic sleeve 13 is activated to extend, and the electric telescopic sleeve 13 drives the positioning seat 71 to approach the inner wall of the thin-walled bearing. Then, all the rubber teeth 72 on the positioning seat 71 abut against the inner ring of the thin-walled bearing, so that the inner ring of the thin-walled bearing can move synchronously with the electric telescopic rod 11. At this time, the suction cup 82 is located in the middle of each rubber tooth 72, and the periphery of the suction cup 82 is sealed by all the rubber teeth 72, which increases the connection stability between the suction cup 82 and the inner ring of the thin-walled bearing.

[0065] like Figure 7 As shown, this invention provides a dynamic load testing device for a bearing testing bench in vehicle production. The water circulation system 9 includes a water tank 91, a water pipe 92, a one-way solenoid valve 93, and a rubber hose 94.

[0066] The electric telescopic rod 11 is externally fixedly connected to a water tank 91. Each of the rubber teeth 72 is provided with a rubber tube 94 that communicates with the positioning seat 71. Each rubber tooth 72 is provided with an opening groove for placing the rubber tube 94. Two water pipes 92 are provided between the positioning seat 71 and the water tank 91. One-way solenoid valves 93 with opposite directions of conduction are provided on each of the two water pipes 92. A water pump that can drive water flow between the positioning seat 71 and the water tank 91 is provided in the water tank 91.

[0067] In this embodiment, when the temperature of the thin-walled bearing is too high during testing, the water pump in the water tank 91 is started, and the cooling water circulates between the positioning seat 71 and the water tank 91, thereby preventing the suction cup 82 from melting due to excessive temperature. At the same time, the cooling water can cool down the thin-walled bearing, preventing the inner ring of the thin-walled bearing from becoming too hot and causing high-temperature deformation during continuous rotation testing.

[0068] like Figure 1 As shown, this invention provides a dynamic load testing device for a bearing testing bench used in vehicle production. The pressurization mechanism 4 includes a fixed base 41, an electric telescopic base 42, and a clamp 43.

[0069] Both sides of the limiting seat 3 are fixedly connected to a fixed seat 41. An electric telescopic seat 42 is fixedly connected to the end face of the fixed seat 41 opposite to the limiting seat 3. A clamp 43 is fixedly connected to the telescopic end of the electric telescopic seat 42.

[0070] In this embodiment, the electric telescopic seats 42 on both sides of the limiting seat 3 are extended simultaneously. The electric telescopic seats 42 can drive the clamps 43 connected to them to apply external pressure to the outer ring of the thin-walled bearing, thereby testing the compressive strength of the thin-walled bearing.

[0071] The control system includes:

[0072] The monitoring module includes a pressure sensor and a vibration sensor. Each of the positioning seats 71 is provided with a pressure sensor. The pressure sensor is located on the end face of a rubber tooth 72 facing the inner wall of the thin-walled bearing. The electric telescopic rod 11 is provided with a vibration sensor on the side wall near the thin-walled bearing.

[0073] The storage module is used to store the pressure values ​​of all pressure sensors and the vibration frequency values ​​of vibration sensors at the same time.

[0074] The processing module is used to compare the pressure values ​​of all pressure sensors and the vibration frequency values ​​of vibration sensors at the same time with the pressure threshold and vibration frequency threshold in the corresponding processing module, and form judgment information respectively.

[0075] The control module is used to control the elastic component 5, the limiting mechanism 6, the positioning component 7, the suction component 8, and the water circulation system 9.

[0076] Working principle:

[0077] When the motor 10 drives the inner ring of the thin-walled bearing to rotate through the electric telescopic rod 11, during the long-term rotation test, the long-term high-load operation of the motor 10 is prone to loosening of its own fixation, resulting in increased vibration during operation. As the motor 10 vibrates, the connection stability between the electric telescopic rod 11 and the inner ring of the thin-walled bearing decreases. At this time, the vibration of the motor 10 and the electric telescopic rod 11, as well as the connection stability between the electric telescopic rod 11 and the inner ring of the thin-walled bearing, will affect the dynamic load test results of the thin-walled bearing.

[0078] In this scheme, when limiting the motor 10 and the electric telescopic rod 11, the No. 1 air pump 52 is set at the bottom of the motor 10 to reduce the vibration of the motor 10, so as to avoid the long-term vibration of the test platform 1 causing the connection between the motor 10 and the support frame 2 to loosen; when all the electric telescopic frames 61 are activated to extend, all the electric telescopic frames 61 simultaneously drive the gears 62 connected to them to mesh with the gear sleeves 63 on the electric telescopic rod 11. Under the limiting action of all the gears 62, the electric telescopic rod 11 is always positioned at the center of the thin-walled bearing. The inclined surfaces of the gears 62 and the gear sleeves 63 on the electric telescopic rod 11 are in contact with each other, which can increase the contact area between the gears 62 and the gear sleeves 63, thereby increasing the positioning effect of each gear 62 on the gear sleeves 63.

[0079] When connecting and fixing the electric telescopic rod 11 to the inner ring of the thin-walled bearing, as the electric telescopic sleeve 13 extends, the suction cup 82 can be adsorbed and fixed to the inner ring of the thin-walled bearing. Simultaneously, the positioning seat 71 drives the rubber teeth 72 to abut against the inner ring of the thin-walled bearing, further increasing the connection stability between the electric telescopic rod 11 and the inner ring of the thin-walled bearing. The rubber teeth 72 are inclined in the same direction of rotation. Figure 5When the electric telescopic rod 11 rotates clockwise, the squeezing force between each rubber tooth 72 can increase the connection stability between the positioning seat 71 and the inner ring of the thin-walled bearing. At the same time, all the rubber teeth 72 can seal the periphery of the suction cup 82, increasing the sealing stability between the suction cup 82 and the inner ring of the thin-walled bearing.

[0080] During the test, when the vibration frequency value of the vibration sensor reaches the preset threshold in the processing module, the control module controls the elastic component 5 and the limiting mechanism 6 to start. The rubber pad 51 can increase the air pressure in the first air pump 52, thereby increasing the stability of the motor 10 and avoiding errors in the test results of the thin-walled bearing caused by the vibration of the motor 10. At the same time, all the electric telescopic frames 61 extend and simultaneously drive the gears 62 connected to them to mesh with the gear sleeves 63 on the electric telescopic rod 11. Under the limiting action of all the gears 62, the electric telescopic rod 11 is always positioned at the center of the thin-walled bearing. Through the cooperation of the elastic component 5 and the limiting mechanism 6, the stability of the motor 10 and the electric telescopic rod 11 during operation is guaranteed.

[0081] Furthermore, the control module increases the rated conduction pressure of the two water pipes 92, thereby increasing the water pressure in the positioning seat 71. This allows each rubber pipe 94 to elastically squeeze the rubber teeth 72 under the action of water pressure, thereby increasing the vibration reduction effect on the end of the electric telescopic rod 11 and preventing the electric telescopic rod 11 from colliding with the inner ring of the thin-walled bearing when it vibrates.

[0082] When the pressure value of a pressure sensor is less than the preset threshold in the processing module, the control module activates the limiting mechanism 6, the suction component 8, and the electric telescopic sleeve 13. The limiting mechanism 6 ensures that the end face of the electric telescopic rod 11 is at the center of the thin-walled bearing, preventing the electric telescopic rod 11 from shifting and causing unstable connection between the electric telescopic rod 11 and the inner ring of the thin-walled bearing. At the same time, each electric telescopic sleeve 13 extends to increase the contact force between the rubber teeth 72 and the inner ring of the thin-walled bearing. The second air pump 83 is activated and further reduces the air pressure in the elastic telescopic sleeve 81, thereby increasing the tightness of the connection between the suction cup 82 and the inner ring of the thin-walled bearing.

[0083] During the above process, the rubber tube 94, in conjunction with the rubber teeth 72, can not only cool the inner ring of the thin-walled bearing, but also provide targeted cooling protection for each suction cup 82. Furthermore, when the motor 10 and the electric telescopic rod 11 vibrate, the control module controls the rated conduction pressure of the two water tubes 92 to increase, so that each rubber tube 94 can elastically squeeze the rubber teeth 72 under the action of water pressure, thereby increasing the vibration reduction effect on the end of the electric telescopic rod 11.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dynamic load testing device for a bearing testing bench in vehicle production, comprising a testing bench (1), wherein a support frame (2) is fixedly connected to the testing bench (1), characterized in that, The upper end face of the support frame (2) is fixedly connected to a motor (10), and an elastic component (5) for damping the motor (10) is provided between the motor (10) and the support frame (2). The output shaft of the motor (10) is fixedly connected to an electric telescopic rod (11), and a sleeve (12) is fixedly connected to the telescopic end of the electric telescopic rod (11). A limiting mechanism (6) for positioning the electric telescopic rod (11) is provided on the outside of the electric telescopic rod (11). The sleeve (12) is fixedly connected to a plurality of retractable electric telescopic sleeves (13). Each telescopic end of the electric telescopic sleeve (13) is provided with a suction component (8). The suction component (8) can be attracted and fixed to the inner ring of the thin-walled bearing. Each suction component (8) is fixedly connected to a positioning component (7). All positioning components (7) can abut and limit the inner ring of the thin-walled bearing. The positioning components (7) can seal the area around the suction component (8). All positioning components (7) are connected to a water circulation system (9). The water circulation system (9) can dissipate heat from the positioning components (7) and the inner ring of the thin-walled bearing. The testing platform (1) is provided with a pressurizing mechanism (4) for applying external load to the outer ring of the thin-walled bearing. A limiting seat (3) is provided in the middle of the pressurizing mechanism (4). The limiting seat (3) is fixedly connected to the upper end face of the testing platform (1). The control system can adjust the position of the motor (10) by controlling the elastic component (5), the limiting mechanism (6), the positioning component (7), the suction component (8) and the water circulation system (9), while the control system adjusts the connection stability between the electric telescopic rod (11) and the thin-walled bearing.

2. The dynamic load testing device for a bearing testing bench in vehicle production according to claim 1, characterized in that, The elastic component (5) includes a rubber pad (51) and a first air pump (52). The first air pump (52) is provided between the motor (10) and the upper end face of the support frame (2). The bottom surface of the support frame (2) is provided with a rubber pad (51). The rubber pad (51) and the first air pump (52) are connected by a conduit, and the conduit is provided with a unidirectional air valve that leads to the first air pump (52).

3. The dynamic load testing device for a bearing testing bench in vehicle production according to claim 1, characterized in that, The limiting mechanism (6) includes an electric telescopic frame (61), a gear (62), a gear sleeve (63), and a fixed frame (64). The fixed frame (64) is fixedly connected to the end face of the testing table (1). Multiple electric telescopic frames (61) are fixedly distributed on the inner wall of the fixed frame (64). The telescopic ends of the electric telescopic frames (61) are rotatably equipped with gears (62). The electric telescopic rod (11) is fixedly connected to the outside with a toothed sleeve (63). The toothed sleeve (63) can mesh with all the gears (62). The meshing teeth on the gears (62) and the toothed sleeve (63) are made of rubber. The middle part of the gear (62) is provided with an exhaust fan blade.

4. The dynamic load testing device for a bearing testing bench in vehicle production according to claim 1, characterized in that, The suction assembly (8) includes an elastic telescopic sleeve (81), a suction cup (82), and a second air pump (83). The elastic telescopic sleeve (81) is fixedly connected to the telescopic end of the electric telescopic sleeve (13). The telescopic end of the elastic telescopic sleeve (81) is fixedly connected to a suction cup (82). A second air pump (83) is provided in the sleeve (12). The second air pump (83) is connected to all suction cups (82) through each electric telescopic sleeve (13).

5. The dynamic load testing device for a bearing testing bench for vehicle production according to claim 4, characterized in that, The positioning component (7) includes a positioning seat (71) and rubber teeth (72); The fixed part of the elastic telescopic sleeve (81) is fixedly connected to the positioning seat (71). The end face of the positioning seat (71) near the suction cup (82) is arc-shaped, and multiple rubber teeth (72) are fixedly connected on the arc-shaped surface of the positioning seat (71). The rubber teeth (72) are inclined in the same rotation direction.

6. The dynamic load testing device for a bearing testing bench in vehicle production according to claim 5, characterized in that, The water circulation system (9) includes a water tank (91), a water pipe (92), a one-way solenoid valve (93), and a rubber hose (94). The electric telescopic rod (11) is externally fixedly connected to a water tank (91). Each of the rubber teeth (72) is provided with a rubber tube (94) that communicates with the positioning seat (71). Each of the rubber teeth (72) is provided with an opening slot for placing the rubber tube (94). Two water pipes (92) are provided between the positioning seat (71) and the water tank (91). One-way solenoid valves (93) with opposite directions of conduction are provided on each of the two water pipes (92). A water pump that can drive water flow between the positioning seat (71) and the water tank (91) is provided in the water tank (91).

7. The dynamic load testing device for a bearing testing bench in vehicle production according to claim 6, characterized in that, The control system includes: The monitoring module includes a pressure sensor and a vibration sensor. Each of the positioning seats (71) is provided with a pressure sensor. The pressure sensor is located on the end face of a rubber tooth (72) facing the inner wall of the thin-walled bearing. The electric telescopic rod (11) is provided with a vibration sensor on the side wall near the thin-walled bearing. The storage module is used to store the pressure values ​​of all pressure sensors and the vibration frequency values ​​of vibration sensors at the same time. The processing module is used to compare the pressure values ​​of all pressure sensors and the vibration frequency values ​​of vibration sensors at the same time with the pressure threshold and vibration frequency threshold in the corresponding processing module, and form judgment information respectively. The control module is used to control the elastic component (5), the limiting mechanism (6), the positioning component (7), the suction component (8), and the water circulation system (9).

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